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Which chemical element is important for reducing air pollution? A. Carbon B. Oxygen C. Nitrogen D. Sulfur 相关知识点: 试题来源: 解析 B。解析:氧气能够支持燃烧,帮助减少大气中的污染物,而碳、氮、硫在某些情况下可能会造成污染。反馈 收藏
Chemical elements can be named after planets. Which element is named after Uranus? A. Uranium B. Platinum C. Potassium D. Phosphorus 相关知识点: 试题来源: 解析 A。铀(Uranium)是以天王星(Uranus)命名的。铂(Platinum)、钾(Potassium)、磷(Phosphorus)都不是以行星命名。
Chemical elements can be named after minerals. Which element is named after a mineral containing iron? A. Manganese B. Magnesium C. Mercury D. Molybdenum 相关知识点: 试题来源: 解析 A。锰(Manganese)是以一种含有铁的矿物命名的。镁(Magnesium)、汞(Mercury)、钼(Molybdenum)都不是以含有铁的矿...
Chemical elements may be named after famous scientists. Which element is named after Marie Curie? A. Curium B. Cadmium C. Calcium D. Carbon 相关知识点: 试题来源: 解析 A。锔(Curium)是以玛丽·居里(Marie Curie)和皮埃尔·居里(Pierre Curie)命名的。镉(Cadmium)、钙(Calcium)、碳(Carbon)都不是...
The red organic electroluminescence element which contains the chemical compound which is shown withPROBLEM TO BE SOLVED: To provide a new compound as a material for a red organic EL element and device, and make a EL device fit to the NTSC standard.陳 良吉...
Some chemical elements are named after countries. Which element is named after France? A. 中利认议任车亲下没重能全节属中利认议任车亲下没重能全节属Gallium中利认议任车亲下没重能全节属中利认议任车亲下没重能全节属 B. 装斯阶科近书正相斗战委装斯阶科近书正相斗战委Germanium装斯阶科近...
百度试题 题目The content of which chemical element is usually constant in a nucleic acid: _ A.CB.OC.ND.HE.P相关知识点: 试题来源: 解析 E 反馈 收藏
【题文】 Carbon is a chemical element which is present in organic compounds that make us organisms, plants as well as fossil. It is a vital component of the greenhouse gas CO2, the highest percentage of the global warming gas in the atmosphere. These Green House Gases (GIIGs) along with...
(57)< Abstract > It was improved production method of the new multilayer thin film element where insulating layer (16) of the gradual chemical quantity is included and the multilayer thin film element which includes the insulating layer (16) of the gradual chemical quantity. Element structure, ...